Diaphragm.



I. W. OWEN I A. IIBWIII.'

DIAPHRAGM.

APPLICATION FILED JAN. 25, 1912.

Patented Nov. 24, 1914.

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ATTORNEY iran STAWENT ,OFEICE- .minus w. ownN, or rinNsnowNn, PENNSYLVANIA, AND .annnarrs nnwrrrpor eAmnnN, New .inasnin assis-Nens To vieron TALKING LMannini?. COMPANY,

A CORPOEATIGN @F NEW JERSEY.

DIAPHRAGFL l To all whom it may concern.'

Be itknown that we, JAMES W. OWEN, a citizen of the United States, and a resident of Lansdowne, in the county of Delaware, State of Pennsylvania, and ALBnR'ris HEW- Irr a citizen of the United States, and a resident. of Camden, county of Camden, Stateof New Jersey, have invented certain new and useful Improvements in Diaphragms, whereof the following is a specifi.-

cation, reference being had to they accompan ing drawing.

T 's invention particularly relates to d iaphragme for sound recordin ducing devices, such as are preferably adaptedto talking machine construction.

mospheric changes, and t lheprinci al objects of this invention are, to provide a diaphragm that will respond with perfect clearness to the most delicate vibrations, irrespective of any atform of this invention; Fig. 2 is a front elevational view of a diaphragm formed of fine woven fabric; Fig. 3 is a view similar to Fi 2, showing the fabric treated with an electrically conductive material; Fig.. 4 is a view similar to Figs. 2 and 3, showing the fabric diaphragm having an integ'ument of metal; Fig. 5 is a fragmentary transverse i sectional view of the diaphragm shown in Fig. l; Fig. 6 is a front elevational view of a diaphragm similar to the diaphragm shown in Fig. 2, but cfa relatively coarser fabric;

, Fig. 7 is a fragmentary transverse sectional view of the diaphragm shown in Fig. showing its interstices provided with a lilling, and Fig. Sis a fragmentary transverse sectional view similar to Fig. 7, showing a dermatoid metallic integument formed therewith.

at will accurately Specification of Letters Patent: I Patented Nov. 24.., I l l l Application filed January 25, 1912. Serial No. 673,444.

It is well known that in the production off diaphragms formed of mica, considerable, waste is necessary in producin such.v diaf, phragms of the proper size an thickness, and in dia hragms formed of sheet metal it is dill'ic t to produce diaphra of absolutely uniform thickness andlltension whereas diaphragme constructed inaccordf ance with the present invention, Aby. ari-'electrolytic process, may be produced with'ab#r solute uniformity.

It has been found by extensive experimentthat diaphragme formed by electro-deposifl tion produce a tone of superior quality, which may be by reason of the fact that the. plating operationfdoes not produce a difference of tension at different regions or upon opposite sides of the diaphragm, or in other words the strains, if any, are equally dis-,

tributed. i The simplest form of this invention g is shown in Fig. l of the drawing, whereinthe. diaphragm 10 is formed of electricallydei.` posited metal per 3e, preferably. nickel which is produced by electroplating a;polaished surface, and 'then stripping the clectrical'ly 'deposited lmetal therefrom, thus forming a thin uniform diaphragm which is wholly composed ofv integrated particles-m metal coalesced by electrical deposition.

The form of this yinvention shown in Figs. 2 to 5 inclusive comprises a composite diaphragm which is preferably formed of a silk fabric body or base l2, shown in Fig. 2, which may be immersed in water or other suitable adherent, and coated with a 'powder of an electro-conductive material which although indicated by the speckles 13 in Fig. 3, may be of a very fine powder or even liquid. .The silk diaphragm ,body or base thus coated may then be immersed in an electroplating bath, preferably nickel, and provided with a dermatoidal electroplating 1d of the metal desired, the plating on the oppositev faces being preferably united in integral relation through the interstices between the threads 15 of thewoven body or base, as shown at 16, as best shown in Fig. 5.

The form ofthis invention shown in Figs. 6 to 8 inclusive comprises a diaphragm formed of a relatively coarse fabric 18, as

shown in Fig. 6, which may be treated with silicate of soda (water glass) or other suitable material, for providing a filling 2O for scription that diaphragme formed in accordance with this invention may be both flexible and light and capable of responding to any and all vibrations, and quickly regaining its equilibrium, yet be exceedingly stable.

In view of the numerous forms of diaphragms vwhich may be produced in the manner above set forth, it is not desired to limit this invention to the precise details of construction and arrangement herein set forth, as it is believed that various modifications may be made Without departing from the essential features of the invention as defined in the appended claims.

Havingthus described our invention, We claim: l l Y Q 1. A diaphragm for sound recording and reproducinglnachines en'ibodying in its construction a non-metallic base and a sheet of o electrodeposited metal intimately united thereto. 2. A diaphragm for sound recording and reproducing machines embodying iny its con-l struction a' sheet of non-metallic material having an--electroplating of nickel formedA thereon and substantially thereof. y s

3. A diaphragm for sound recording and covering a face reproducing machines embodying in its construction a textile fabric base, and an integumsnt of electrodeposited metal united thereto.

l. A diaphragm for sound recording and reproducing machines comprising in its construction, a textile fabricbase, and a sheet of electrodeposited metal intimately united thereto.

5. A diaphragm for sound recording and reproducing machines comprising in its construction a textile fabric base, and a sheet of olectrodeposited metal unitarily secured thereto and covering one side thereof.

6. A. diaphragm for sound recording and reproducing machines, comprising a fabric base, and an electro-plate of metal united thereto.

7 A diaphragm for sound recording and reproducing machines, comprising in its construction a textile fabric plated with metal.

8. A diaphragm for sound recording andreproducing machines, embodying in its construction a textile fabric having an electroplate of metal joined through its interstices.

i). A diaphragm for a sound recording and reproducing machine embodying-in its construction a sheet of non-metallic material and a. sheet of electrodeposited metal unita-- rily secured thereto.l

In Witness whereof, We have hereunto set our yhands this 22nd day ofl January, A. D.l

1912. v JAMES W. OVEN.

' A ALBERTIS HEWITT. I Witnesses: i

FRANK' B. MiDDLE'roN, Jr.,`

JOHN D. MYERS. l 

